PMID- 25686985
OWN - NLM
STAT- MEDLINE
DCOM- 20160223
LR  - 20180414
IS  - 1873-0191 (Electronic)
IS  - 0928-4931 (Linking)
VI  - 49
DP  - 2015 Apr
TI  - Titania nanotubes from weak organic acid electrolyte: fabrication, 
      characterization and oxide film properties.
PG  - 567-578
LID - S0928-4931(15)00055-7 [pii]
LID - 10.1016/j.msec.2015.01.045 [doi]
AB  - In this study, TiO2 nanotubes were fabricated using anodic oxidation in fluoride 
      containing weak organic acid for different durations (0.5h, 1h, 2h and 3h). 
      Scanning electron microscope (SEM) micrographs reveal that the morphology of 
      titanium oxide varies with anodization time. Raman spectroscopy and X-ray 
      diffraction (XRD) results indicate that the as-formed oxide nanotubes were 
      amorphous in nature, yet transform into crystalline phases (anatase and rutile) 
      upon annealing at 600 degrees C. Wettability measurements show that both as-formed and 
      annealed nanotubes exhibited hydrophilic behavior. The electrochemical behavior 
      was ascertained by DC polarization and AC electrochemical impedance spectroscopy 
      (EIS) measurements in 0.9% NaCl solution. The results suggest that the annealed 
      nanotubes showed higher impedance (10(5)-10(6)Omegacm(2)) and lower passive current 
      density (10(-7)Acm(-2)) than the as-formed nanotubes. In addition, we 
      investigated the influence of post heat treatment on the semiconducting 
      properties of the oxides by capacitance measurements. In vitro bioactivity test 
      in simulated body fluid (SBF) showed that precipitation of Ca/P is easier in 
      crystallized nanotubes than the amorphous structure. Our study uses a simple 
      strategy to prepare nano-structured titania films and hints the feasibility of 
      tailoring the oxide properties by thermal treatment, producing surfaces with 
      better bioactivity.
CI  - Copyright (c) 2015 Elsevier B.V. All rights reserved.
FAU - Munirathinam, Balakrishnan
AU  - Munirathinam B
AD  - Department of Metallurgical and Materials Engineering, Indian Institute of 
      Technology Madras, Chennai 600036, India. Electronic address: 
      blkrish88@gmail.com.
FAU - Neelakantan, Lakshman
AU  - Neelakantan L
AD  - Department of Metallurgical and Materials Engineering, Indian Institute of 
      Technology Madras, Chennai 600036, India.
LA  - eng
PT  - Journal Article
DEP - 20150110
PL  - Netherlands
TA  - Mater Sci Eng C Mater Biol Appl
JT  - Materials science & engineering. C, Materials for biological applications
JID - 101484109
RN  - 0 (Electrolytes)
RN  - 0 (Organic Chemicals)
RN  - 0 (Oxides)
RN  - 15FIX9V2JP (titanium dioxide)
RN  - D1JT611TNE (Titanium)
SB  - IM
MH  - Crystallization/methods
MH  - Electrolytes/*chemistry
MH  - Microscopy, Electron, Scanning/methods
MH  - Nanotubes/*chemistry
MH  - Organic Chemicals/*chemistry
MH  - Oxidation-Reduction
MH  - Oxides/*chemistry
MH  - Spectrum Analysis, Raman/methods
MH  - Surface Properties
MH  - Titanium/*chemistry
MH  - Wettability
MH  - X-Ray Diffraction/methods
OTO - NOTNLM
OT  - Anodic oxidation
OT  - Impedance
OT  - Mott Schottky analysis
OT  - TiO(2) nanotubes
OT  - Titanium
OT  - Wettability
EDAT- 2015/02/18 06:00
MHDA- 2016/02/26 06:00
CRDT- 2015/02/18 06:00
PHST- 2014/09/30 00:00 [received]
PHST- 2014/12/03 00:00 [revised]
PHST- 2015/01/08 00:00 [accepted]
PHST- 2015/02/18 06:00 [entrez]
PHST- 2015/02/18 06:00 [pubmed]
PHST- 2016/02/26 06:00 [medline]
AID - S0928-4931(15)00055-7 [pii]
AID - 10.1016/j.msec.2015.01.045 [doi]
PST - ppublish
SO  - Mater Sci Eng C Mater Biol Appl. 2015 Apr;49:567-578. doi: 
      10.1016/j.msec.2015.01.045. Epub 2015 Jan 10.